rickets is a nutritional disorder that can develop if you do not get enough vitamin d calcium or phosphate rickets leads to poor functioning of a bone s growth plate growing edge softened and weakened bones stunted growth and in severe cases skeletal deformities
Hence, a 20-year period of the patent usually gives manufacturers a chance to recoup the cost of developing a new drug. When a drug patent expires, any pharmaceutical company can manufacture and sell the drug. A drug, which is produced and distributed without patent protection is called a generic drug.
Return to top. A patent is the government grant of monopoly on an invention for a limited amount of time. Patents in the United States are granted for seventeen years from the date the patent is issued or for 20 years from the date of filing.Other countries grant patents for similar time periods.atents in the United States are granted for seventeen years from the date the patent is issued or for 20 years from the date of filing. Other countries grant patents for similar time periods.